Railway sleeper



FIG. 1 is a perspective view of a railway sleeper showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevation view thereof, the left side elevation view thereof (not shown) being a mirror image of the right side elevation view;

FIG. 5 is an elevation view of one end thereof; and,

FIG. 6 is an elevation view of the other end thereof.

The broken lines shown in the drawings form no part of the claimed design. 

The ornamental design for a railway sleeper, as shown and described. 